Nortel 8672ATMM Installation Manual page 43

Table 7
MDA LED indications
Label Color
TX Green
—
Amber
RX Green
Green
Amber
Amber
—
Installation — Media Dependent Adapters for the 8672ATME and 8672ATMM Modules
Copyright © 2008 Nortel Networks
.
State Meaning
Steady Indicates network activity for the corresponding port.
A very low level of network activity (approximately
1–5 pps) can cause the LED to blink.
Off The port is not transmitting data (no network activity).
Blinking The port is out of order; the administrative state is
down.
Blinking Indicates network activity for the corresponding port
(the port is receiving traffic).
Steady The port is operational; no network activity.
Blinking The port is not operational; the administrative state
is down.
Steady
A Remote Defect Indication (RDI) alarm condition
has been detected; the administrative state is down.
The RDI alarm condition indicates that a failure
occurred at the far end of the network. In ATM,
when the physical layer detects loss of signal or
cell synchronization, RDI cells are used to report a
VPC/VCC failure. RDI cells are sent upstream by a
VPC/VCC endpoint to notify the source VPC/VCC
endpoint of the downstream failure.
Off The port is not operational. Be sure that the MDA is
fully seated in the slot; check that the port is properly
configured.
Nortel Ethernet Routing Switch 8600
NN46205-316 01.01 Standard
30 May 2008
LEDs 43